Carries 1" diameter 35 MGO .375" thick circular magnets (field through axis) Part. No. ND150Z-35 (1995 price was $16.30 qty one)Also has 1" diameter 27 MGO in 0.5" thick (ND025-27 $22.04) and 0.75" thick (ND030N-27 $27.40) They will fax a 5 page catalog and price list.
On the magnets I was looking for at the time I got the best price from:Magnet Applications
http://www.arborsci.comAsk for MgOe27 neodymium, its plenty strong but not hyper-expensive. Arbor Scientific has NIB magnets in the form of 1/2" disks. They are priced around $10 each. This may seem expensive, but it is actually lower priced than Samarium-Cobalt supermagnets, and they are stronger. And they are worth it just for the amazing things you can do with them.
There is also an industrial supplier named Tridus in Paramount, California where you can get them for $3 each, but there is a $50 minimum order.Tridus International
310-408-2222(VERY low prices, but $50 minimum.)
Master Magnetics Magnet Sales Inc.1-800-421-6692